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Finding the Fourth Proportional to 221,010.90, 331,516.35 and 54,798.90

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Solution

The fourth proportional to 221,010.90, 331,516.35 and 54,798.90 is: 82,198.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    221,010.90 : 331,516.35 = 54,798.90 : x
  2. Step 2: Convert to fraction form
    221,010.90/331,516.35 = 54,798.90/x
  3. Step 3: Cross multiply
    221,010.90x = 331,516.35 × 54,798.90
  4. Step 4: Simplify right side
    221,010.90x = 18,166,731,312.02
  5. Step 5: Solve for x
    x = 18,166,731,312.02/221,010.90
  6. Step 6: Final answer
    x = 82,198.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.